Re: Bumper Black

This is trite in the posts of heavy duty repairs but I was wondering if
anyone has a sure fire way to reblacken the exterior trim.
Something that lasts more that 2 rains is preferred.
I have tried "Black Again", "black Chrome", etc etc.
Am contemplating Girot's product. Any experience out there?
Thanks.
87 5CSTQ - 104,000
Agreat car, a great hobby!